Improve README

README

+### README ###
+
+
+### Authentification SAML for Odoo/OpenERP ###
+
 This is a module for odoo/OpenERP 7. It provides authentification via SAML.
@@ -1,1 +6,19 @@
 This is a module for odoo/OpenERP 7. It provides authentification via SAML.
+
+
+This module allows to deport the management of users and passwords in an
+external authentication system to provide SSO functionality (Single Sign On )
+between Odoo and other applications of your ecosystem.
+
+Benefits
+========
+
+* Reducing the time spent typing different passwords for different accounts.
+
+* Reducing the time spent in IT support for password oversights.
+
+* Centralizing authentication systems.
+
+* Securing all input levels / exit / access to multiple systems without prompting users.
+
+* The centralization of access control information for compliance testing to different standards.